Flash Code Output
Most OpenECU modules can flash an LED to inform the user of the state of the ECU. This is particularly useful when other means of communication with the ECU, such as CAN, are not available.
Supported ECUs: M220, M250, M460, M461, M670.
Setup
Connect an LED between Vpwr (ECU power supply pin) and the flash code pin.
Note
The flash code pin cannot supply enough current for a lamp. An LED must be used.
Use an LED calculator for selecting the proper series resistor if it is not built into your LED.
Refer to the Technical Specification to find the flash code pin.
Procedure
Once the LED is connected and power is supplied to the ECU, the LED will begin flashing. The flash sequence represents a three-digit code, where each digit is flashed a number of times equal to its value.
The following diagram illustrates the flash sequence for code 113:
Each of the marks lasts for a specific duration:
Mark |
Duration and Meaning |
|---|---|
Start of log mark |
3 sec - marks the start of the flash code |
Digit mark |
1 sec - marks the start of a digit |
dn(x) |
OFF for 0.5 sec, ON for 0.5 sec, repeated x times |
End code mark |
3 sec - marks the end of the flash code |
Mark durations are as follows:
Mark |
Duration and Meaning |
|---|---|
Start of log mark |
3 sec - marks start of code |
Digit mark |
1 sec - start of a digit |
dn(x) |
OFF for 0.5 sec, ON for 0.5 sec, repeated x times |
End code mark |
3 sec - end of code |
Multiple codes may be present.
If your ECU does not flash a code, consult Dead ECU.
Flash Code Meanings
Code |
Meaning |
|---|---|
111 |
Running normally in application mode |
112 |
In reprogramming mode due to negative FEPS |
113 |
In reprogramming mode due to positive FEPS |
114 |
In reprogramming mode due to FEPSless request (CCP) |
115 |
In reprogramming mode due to no valid application |
116 |
In reprogramming mode due to FEPS pin electrical failure |
117 |
In reprogramming mode due to repeated reset in application mode |
118 |
In reprogramming mode due to :failed application checksum |
119 |
In reprogramming mode due to FEPSless ISO reprogramming request |
121 |
In reprogramming mode due to an unknown failure |
123 |
In reprogramming mode due to a watchdog reset |
128 |
In reprogramming mode due to a failed RAM check |
222 |
In reprogramming mode due to no valid license |